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Medial Portal Drilling: Effects on the Femoral Tunnel Aperture Morphology During Anterior Cruciate Ligament Reconstruction by Daniel Hensler, Zachary M.

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Presentation on theme: "Medial Portal Drilling: Effects on the Femoral Tunnel Aperture Morphology During Anterior Cruciate Ligament Reconstruction by Daniel Hensler, Zachary M."— Presentation transcript:

1 Medial Portal Drilling: Effects on the Femoral Tunnel Aperture Morphology During Anterior Cruciate Ligament Reconstruction by Daniel Hensler, Zachary M. Working, Kenneth D. Illingworth, Eric D. Thorhauer, Scott Tashman, and Freddie H. Fu J Bone Joint Surg Am Volume 93(22):2063-2071 November 16, 2011 ©2011 by The Journal of Bone and Joint Surgery, Inc.

2 Figs. 1-A and 1-B Three-dimensional model showing different transverse drill angles. α = angle at which the drill bit intersects the bone. Daniel Hensler et al. J Bone Joint Surg Am 2011;93:2063- 2071 ©2011 by The Journal of Bone and Joint Surgery, Inc.

3 Coronal computed tomography scan of the femur, showing the short axis of the oval aperture (d = drill-bit diameter) and the major axis (h = hypotenuse) and the angle at which the drill bit intersects the bone (α = transverse drill angle). Daniel Hensler et al. J Bone Joint Surg Am 2011;93:2063- 2071 ©2011 by The Journal of Bone and Joint Surgery, Inc.

4 Figs. 3A, 3-B, and 3-C Examples of different knee flexion angles. Daniel Hensler et al. J Bone Joint Surg Am 2011;93:2063- 2071 ©2011 by The Journal of Bone and Joint Surgery, Inc.

5 Line graph demonstrating that the femoral bone tunnel aperture length is dependent on the transverse drill angle and the drill-bit diameter. Daniel Hensler et al. J Bone Joint Surg Am 2011;93:2063- 2071 ©2011 by The Journal of Bone and Joint Surgery, Inc.

6 Line graph demonstrating that the femoral bone tunnel aperture area is dependent on the transverse drill angle and the drill-bit diameter. Daniel Hensler et al. J Bone Joint Surg Am 2011;93:2063- 2071 ©2011 by The Journal of Bone and Joint Surgery, Inc.

7 Line graph showing the effect of changing the knee flexion angle on the missed area of the femoral tunnel aperture orientation relative to the native insertion site of the ACL (with use of a 9-mm drill-bit diameter at a transverse drill angle of 40°). Daniel Hensler et al. J Bone Joint Surg Am 2011;93:2063- 2071 ©2011 by The Journal of Bone and Joint Surgery, Inc.

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